Perhaps a sensor is picking up a draught from the loading bay, a member of staff forgot the alarm was live, or the system is simply getting old. Whatever the cause - false alarms happen.
For most businesses, an occasional nuisance activation is manageable. But if your commercial alarm is monitored with police response, too many false alarms will cost you something far more serious than a call-out inconvenience: you could lose the Level 1 police response your business depends on.
Cutting false alarms is the whole reason the NPCC Security Systems Policy exists - its stated aim is to reduce the number of false calls passed to the police. False calls divert police away from genuine emergencies, which is why the policy comes down hard on premises that generate repeat activations. For businesses with NSI Gold approved, SSAIB certificated, ARC-monitored systems, false activations are far less likely - but even one careless activation counts against your record.
This is what the rules actually say - and what you need to do to stay protected.
Under the NPCC Security Systems Policy - the national framework governing police response to alarm activations in England, Wales and Northern Ireland - a false alarm is any activation not resulting from:
In practice, any activation where there is no apparent damage, forced entry, or evidence of intrusion is recorded as a false alarm - unless the business can demonstrate otherwise. Line faults count too.
Responsibility for false alarm management is shared between three parties: your installing company, your maintenance provider, and your Alarm Receiving Centre (ARC). Under the NPCC Security Systems Policy, all three must be either NSI Gold approved or SSAIB certificated for your alarm to qualify for Level 1 police response.
But your obligations do not end there.
As the premises manager, you are responsible for ensuring your staff understand how to operate the system correctly, that false activations from user error are minimised, and that you act promptly when your maintenance company identifies faults. The police log every false call against your Unique Reference Number (URN) - and the consequences get more serious with each one.
Written warning after two false calls. If your premises generates two false alarm calls in any rolling 12-month period, you and your maintaining company receive a written warning from the police.
Level 1 response withdrawn after three false calls. A third false alarm call within the same rolling 12-month window triggers withdrawal of Level 1 police response. You will receive a letter confirming this. Response is withdrawn no fewer than 14 days from the date of that letter.
At this point, your alarm moves from Level 1 - immediate attendance from the nearest available police unit - to Level 3: no police attendance at all when your ARC contacts them. There is no Level 2 delayed response in England, Wales and Northern Ireland - that tier was abolished. It is a direct step from protected to unprotected.
If police response stays withdrawn for more than six months without an application for reinstatement, the police will delete your URN entirely. Deletion takes effect 14 days from the date of the deletion letter.
It is not only your URN at risk. If your installing or maintaining company exceeds the relevant police force's benchmark for false alarms across their client base, the police can suspend that company's ability to offer Level 1 response for any of their customers.
This is why choosing an NSI Gold approved or SSAIB certificated company matters beyond the initial installation. Certified companies are subject to regular independent audit - including review of their false alarm performance - and must comply with BS 8473:2018, the British Standard code of practice for false alarm management. Each certified company must appoint a System Performance Manager responsible for monitoring trends and intervening when false alarm rates rise.
We hold both NSI Gold approval and SSAIB certification - and our false alarm performance is audited as part of those schemes. You can verify our accreditations on the NSI Company Finder and the SSAIB register.
The reason properly certified systems generate far fewer false police call-outs than uncertified systems comes down to one standard: BS 8243:2021.
Under this British Standard, a confirmed alarm requires corroboration before the ARC contacts police. BS 8243:2021 permits any single confirmation method or combination - the three recognised methods are sequential confirmation (two independent detectors in different zones both activating within a defined period), audio confirmation (ARC operators listen via microphones) and visual confirmation (ARC operators review CCTV images). If no confirmed signal is generated, your keyholders are notified, but police are not called.
This confirmation layer is built into every system we install and maintain to current PD 6662:2017 standards. It is the single most important technical reason a well-maintained, certified system gives you genuine police response - not just a monitoring contract.
If your Level 1 response has been withdrawn, you can apply to have it reinstated - but there is no quick fix.
Your system must comply with current standards (PD 6662:2017 and BS 8243:2021). Your NSI Gold approved or SSAIB certificated alarm company will confirm whether your current system meets these requirements or needs upgrading.
Once the cause of the false alarms has been identified and resolved, you must demonstrate 90 consecutive days free from false alarms - counted from the date of your last false activation, evidenced by your monitoring company's records.
If your URN has already been deleted, a fresh application will be required - your alarm company handles this on your behalf.
Get in touch with us early if you are in this position. The longer a system sits at Level 3, the longer your premises is effectively unprotected for out-of-hours incidents. We can diagnose the cause, carry out any necessary upgrades, and manage the reinstatement process for you.
Choosing an NSI Gold approved or SSAIB certificated company for installation, maintenance and monitoring is the foundation. These additional steps help protect what that investment gives you.
Under the NPCC Security Systems Policy, a written warning is issued after two false calls in any rolling 12-month period. After a third false call within that window, Level 1 police response is withdrawn. Your alarm moves directly to Level 3 - no police attendance - without any intermediate stage. Level 2 delayed response no longer exists in England, Wales and Northern Ireland.
A URN (Unique Reference Number) is issued by your local police force and is required for Level 1 police response. It is linked to your specific premises and alarm system. Your NSI Gold approved or SSAIB certificated installing company applies for it on your behalf - you cannot apply directly. Without a valid URN, your alarm has no guaranteed police response regardless of how well it is installed or maintained.
To reinstate Level 1 response, you must identify and fix the root cause of the false alarms, then demonstrate 90 consecutive days free from false alarms from the date of the last false activation. Your system must also comply with current standards (PD 6662:2017 and BS 8243:2021). If your URN has been deleted, a new application is required. An NSI Gold approved or SSAIB certificated company can manage the whole reinstatement process.
A monitored commercial alarm system with Level 1 police response is a serious investment in your business's security. False alarms put that investment at risk - and once Level 1 response is withdrawn, every hour your premises sits at Level 3 is an hour you are genuinely exposed.
We have held NSI Gold approval since 2005 and SSAIB certification since 2002. Our Dedication to Accreditation means every system we design, install and maintain is built to current standards - including PD 6662:2017, BS 8243:2021 for confirmed alarm generation, and BS 8473:2018 for false alarm management. Big enough to cope with multi-site commercial clients, small enough to care about every individual system on our books.
If you are concerned about your false alarm record, your current system's compliance, or your Level 1 status, we offer free business security surveys. Call us on 01702 447800 or contact us to arrange a no-obligation review.
You can verify our accreditations on the NPCC policy hub for what the requirements are, and directly on the NSI Company Finder and SSAIB register for Blake's own listing.
